Git hooks

git_shots_hook.rb

#!/usr/bin/ruby
#-*-ruby-*-
# A script to run takes git shots on every commit. Can be run on
# the current dir, called from a git callback, or install itself as a
# git post-commit callback.

HOOKS = %w{post-commit}
HOOKS_DIR = '.git/hooks'

def ensure_git_repo
  if !File.writable?(HOOKS_DIR)
    $stderr.print "The install option [-i] can only be used within a git repo; exiting.\n"
    exit 1
  end
end

def install
  ensure_git_repo
  HOOKS.each { |hook| install_hook("#{HOOKS_DIR}/#{hook}") }
end

def reinstall
  ensure_git_repo
  HOOKS.each { |hook| delete_hook("#{HOOKS_DIR}/#{hook}") }
  install
end

def take_shot(dir, run_in_background = false)
  file="~/.gitshots/#{Time.now.strftime('%Y%m%d%H%M%S')}.jpg"
  unless File.directory?(File.expand_path("../../rebase-merge", __FILE__))
    puts "Taking capture into #{file}!"
    system "imagesnap -q -w 3 #{file} &"
  end
end

def delete_hook(hook)
  File.delete(hook) if File.exists?(hook)
end

def install_hook(hook)
  if File.exists?(hook)
    $stderr.print "A file already exists at #{hook}, and will NOT be replaced.\n"
    return
  end

  print "Linking #{__FILE__} to #{hook}\n"
  %x{ln -s #{__FILE__} #{hook}}
end

if ARGV.first == '-i'
  install
elsif ARGV.first == '-r'
  reinstall
else
  take_shot Dir.pwd, HOOKS.include?(File.basename(__FILE__))
end

install_hooks

tag_hook.rb -i
git_shots_hook.rb -i

tag_hook.rb

#!/usr/bin/ruby
#-*-ruby-*-
# A script to run ctags on all .rb files in a project. Can be run on
# the current dir, called from a git callback, or install itself as a
# git post-merge and post-commit callback.

CTAGS = '/usr/local/Cellar/ctags/5.8/bin/ctags'
HOOKS = %w{post-merge post-checkout}
HOOKS_DIR = '.git/hooks'

def ensure_git_repo
  if !File.writable?(HOOKS_DIR)
    $stderr.print "The install option [-i] can only be used within a git repo; exiting.\n"
    exit 1
  end
end

def install
  ensure_git_repo
  HOOKS.each { |hook| install_hook("#{HOOKS_DIR}/#{hook}") }
end

def reinstall
  ensure_git_repo
  HOOKS.each { |hook| delete_hook("#{HOOKS_DIR}/#{hook}") }
  install
end

def run_tags(dir, run_in_background = false)
  if File.executable?(CTAGS) and File.writable?(dir)
    extensions = ['rb', 'java', 'cs', 'js', 'haml', 'erb', 'm', 'h', 'coffee']
    if File.exists?('Gemfile')
      ctags_command = "bundle list --paths=true | xargs #{CTAGS} -f #{dir}/tags --recurse=yes #{dir}--extra=+f --exclude=.git --exclude=public --exclude=tmp --exclude=*.js --exclude=log -R * 2>> /dev/null"
    else
      ctags_command = "#{CTAGS} -f #{dir}/tags --recurse=yes #{dir} 2>> /dev/null"
    end
    cmd = "#{ctags_command} && find #{dir} #{extensions.map{|ext| " -name '*.#{ext}'"}.join(' -o ')} >| cscope.files && cscope -b -q"
    cmd << ' &' if run_in_background
    $stderr.print "refreshed tags\n"
    #$stderr.print "calling #{cmd}\n"
    system cmd
  else
    $stderr.print "FAILED to write TAGS file to #{dir}\n"
  end
end

def delete_hook(hook)
  File.delete(hook) if File.exists?(hook)
end

def install_hook(hook)
  if File.exists?(hook)
    $stderr.print "A file already exists at #{hook}, and will NOT be replaced.\n"
    return
  end

  print "Linking #{__FILE__} to #{hook}\n"
  %x{ln -s #{__FILE__} #{hook}}
end

if ARGV.first == '-i'
  install
elsif ARGV.first == '-r'
  reinstall
else
  run_tags Dir.pwd, HOOKS.include?(File.basename(__FILE__))
end